Unit One, Chapter One - EM Spectrum Flashcards
What is the relationship between frequency and wavelength?
They are inversely proportional
How can we determine unknown concentrations of an element?
The concentration of an element in a sample is related to the intensity of light emitted or absorbed, this can be used to determine unknown concentrations of an element
How can we identify and quantify the elements present in a sample?
Each element produces a unique pattern of frequencies of radiation in both its emission and absorption spectra. These are used to identify/quantify elements in a sample
How is an absorption spectrum produced?
When photons of light energy are absorbed by atoms, electrons move from a lower energy level to higher one, as this happens an absorption spectrum is produced
How is an emission spectrum produced?
By measuring the intensity of light emitted at different wavelengths
Describe emission spectroscopy
High temps used to excite elections within atoms in a sample, as electros drop to lower energy levels, photons are emitted and measured
In what frequency of radiation do photons transfer more energy?
High-frequency
When a photon is absorbed or emitted…
… the electrons within the substance gain or lose energy
What units is energy given in?
kJ mol^-1
